The ____ period lasts from the ninth week after conception until birth.

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The foetal period is the third and final period of prenatal development and lasts from the ninth week after conception until birth. It is characterized by the continued growth and development of organs and tissues, the refinement of reflexes and movements, and the maturation of the central nervous system. The germinal period is the first period of prenatal development, which lasts from conception to implantation. The embryonic period is the second period of prenatal development, which lasts from implantation to the end of the eighth week. The zygote is the single cell formed by the fusion of sperm and egg at conception.

The ____ Period Lasts from the Ninth Week After Conception